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net: treewide use of RCU_INIT_POINTER

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rcu_assign_pointer(ptr, NULL) can be safely replaced by
RCU_INIT_POINTER(ptr, NULL)

(old rcu_assign_pointer() macro was testing the NULL value and could
omit the smp_wmb(), but this had to be removed because of compiler
warnings)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-11-23 07:09:32 +00:00 committed by David S. Miller
parent 8c2152286a
commit 2cfa5a0471
9 changed files with 21 additions and 21 deletions
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2
drivers/net/ethernet/broadcom/bnx2.c
View File

@ -409,7 +409,7 @@ static int bnx2_unregister_cnic(struct net_device *dev)
mutex_lock(&bp->cnic_lock);
cp->drv_state = 0;
bnapi->cnic_present = 0;
rcu_assign_pointer(bp->cnic_ops, NULL);
RCU_INIT_POINTER(bp->cnic_ops, NULL);
mutex_unlock(&bp->cnic_lock);
synchronize_rcu();
return 0;

2
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
View File

@ -11587,7 +11587,7 @@ static int bnx2x_unregister_cnic(struct net_device *dev)
mutex_lock(&bp->cnic_mutex);
cp->drv_state = 0;
rcu_assign_pointer(bp->cnic_ops, NULL);
RCU_INIT_POINTER(bp->cnic_ops, NULL);
mutex_unlock(&bp->cnic_mutex);
synchronize_rcu();
kfree(bp->cnic_kwq);

6
drivers/net/ethernet/broadcom/cnic.c
View File

@ -506,7 +506,7 @@ int cnic_unregister_driver(int ulp_type)
}
read_unlock(&cnic_dev_lock);
rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
RCU_INIT_POINTER(cnic_ulp_tbl[ulp_type], NULL);
mutex_unlock(&cnic_lock);
synchronize_rcu();
@ -579,7 +579,7 @@ static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
}
mutex_lock(&cnic_lock);
if (rcu_dereference(cp->ulp_ops[ulp_type])) {
rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
RCU_INIT_POINTER(cp->ulp_ops[ulp_type], NULL);
cnic_put(dev);
} else {
pr_err("%s: device not registered to this ulp type %d\n",
@ -5134,7 +5134,7 @@ static void cnic_stop_hw(struct cnic_dev *dev)
}
cnic_shutdown_rings(dev);
clear_bit(CNIC_F_CNIC_UP, &dev->flags);
rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
RCU_INIT_POINTER(cp->ulp_ops[CNIC_ULP_L4], NULL);
synchronize_rcu();
cnic_cm_shutdown(dev);
cp->stop_hw(dev);

4
drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
View File

@ -1301,7 +1301,7 @@ int cxgb3_offload_activate(struct adapter *adapter)
out_free_l2t:
t3_free_l2t(L2DATA(dev));
rcu_assign_pointer(dev->l2opt, NULL);
RCU_INIT_POINTER(dev->l2opt, NULL);
out_free:
kfree(t);
return err;
@ -1329,7 +1329,7 @@ void cxgb3_offload_deactivate(struct adapter *adapter)
rcu_read_lock();
d = L2DATA(tdev);
rcu_read_unlock();
rcu_assign_pointer(tdev->l2opt, NULL);
RCU_INIT_POINTER(tdev->l2opt, NULL);
call_rcu(&d->rcu_head, clean_l2_data);
if (t->nofail_skb)
kfree_skb(t->nofail_skb);

8
drivers/net/macvtap.c
View File

@ -145,8 +145,8 @@ static void macvtap_put_queue(struct macvtap_queue *q)
if (vlan) {
int index = get_slot(vlan, q);
rcu_assign_pointer(vlan->taps[index], NULL);
rcu_assign_pointer(q->vlan, NULL);
RCU_INIT_POINTER(vlan->taps[index], NULL);
RCU_INIT_POINTER(q->vlan, NULL);
sock_put(&q->sk);
--vlan->numvtaps;
}
@ -223,8 +223,8 @@ static void macvtap_del_queues(struct net_device *dev)
lockdep_is_held(&macvtap_lock));
if (q) {
qlist[j++] = q;
rcu_assign_pointer(vlan->taps[i], NULL);
rcu_assign_pointer(q->vlan, NULL);
RCU_INIT_POINTER(vlan->taps[i], NULL);
RCU_INIT_POINTER(q->vlan, NULL);
vlan->numvtaps--;
}
}

2
drivers/net/ppp/pptp.c
View File

@ -162,7 +162,7 @@ static void del_chan(struct pppox_sock *sock)
{
spin_lock(&chan_lock);
clear_bit(sock->proto.pptp.src_addr.call_id, callid_bitmap);
rcu_assign_pointer(callid_sock[sock->proto.pptp.src_addr.call_id], NULL);
RCU_INIT_POINTER(callid_sock[sock->proto.pptp.src_addr.call_id], NULL);
spin_unlock(&chan_lock);
synchronize_rcu();
}

2
drivers/net/team/team_mode_activebackup.c
View File

@ -56,7 +56,7 @@ drop:
static void ab_port_leave(struct team *team, struct team_port *port)
{
if (ab_priv(team)->active_port == port)
rcu_assign_pointer(ab_priv(team)->active_port, NULL);
RCU_INIT_POINTER(ab_priv(team)->active_port, NULL);
}
static int ab_active_port_get(struct team *team, void *arg)

12
drivers/net/wireless/ath/carl9170/main.c
View File

@ -446,7 +446,7 @@ static void carl9170_op_stop(struct ieee80211_hw *hw)
mutex_lock(&ar->mutex);
if (IS_ACCEPTING_CMD(ar)) {
rcu_assign_pointer(ar->beacon_iter, NULL);
RCU_INIT_POINTER(ar->beacon_iter, NULL);
carl9170_led_set_state(ar, 0);
@ -678,7 +678,7 @@ unlock:
vif_priv->active = false;
bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
ar->vifs--;
rcu_assign_pointer(ar->vif_priv[vif_id].vif, NULL);
RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL);
list_del_rcu(&vif_priv->list);
mutex_unlock(&ar->mutex);
synchronize_rcu();
@ -716,7 +716,7 @@ static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
WARN_ON(vif_priv->enable_beacon);
vif_priv->enable_beacon = false;
list_del_rcu(&vif_priv->list);
rcu_assign_pointer(ar->vif_priv[id].vif, NULL);
RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL);
if (vif == main_vif) {
rcu_read_unlock();
@ -1258,7 +1258,7 @@ static int carl9170_op_sta_add(struct ieee80211_hw *hw,
}
for (i = 0; i < CARL9170_NUM_TID; i++)
rcu_assign_pointer(sta_info->agg[i], NULL);
RCU_INIT_POINTER(sta_info->agg[i], NULL);
sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor);
sta_info->ht_sta = true;
@ -1285,7 +1285,7 @@ static int carl9170_op_sta_remove(struct ieee80211_hw *hw,
struct carl9170_sta_tid *tid_info;
tid_info = rcu_dereference(sta_info->agg[i]);
rcu_assign_pointer(sta_info->agg[i], NULL);
RCU_INIT_POINTER(sta_info->agg[i], NULL);
if (!tid_info)
continue;
@ -1398,7 +1398,7 @@ static int carl9170_op_ampdu_action(struct ieee80211_hw *hw,
spin_unlock_bh(&ar->tx_ampdu_list_lock);
}
rcu_assign_pointer(sta_info->agg[tid], NULL);
RCU_INIT_POINTER(sta_info->agg[tid], NULL);
rcu_read_unlock();
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);

4
net/core/netprio_cgroup.c
View File

@ -285,7 +285,7 @@ static int netprio_device_event(struct notifier_block *unused,
break;
case NETDEV_UNREGISTER:
old = rtnl_dereference(dev->priomap);
rcu_assign_pointer(dev->priomap, NULL);
RCU_INIT_POINTER(dev->priomap, NULL);
if (old)
kfree_rcu(old, rcu);
break;
@ -332,7 +332,7 @@ static void __exit exit_cgroup_netprio(void)
rtnl_lock();
for_each_netdev(&init_net, dev) {
old = rtnl_dereference(dev->priomap);
rcu_assign_pointer(dev->priomap, NULL);
RCU_INIT_POINTER(dev->priomap, NULL);
if (old)
kfree_rcu(old, rcu);
}